The olfactory epithelium is a specialized epithelial tissue inside the nasal cavity that is involved in smell. In humans, it measures about 1 square centimetre (on each side) and lies on the roof of the nasal cavity about 7 cm above and behind the nostrils. The olfactory epithelium is the part of the olfactory system directly responsible for detecting odors.
Read more about Olfactory Epithelium: Layers of Olfactory Epithelium, Bowman's (Olfactory) Glands, Pathology, Additional Images